The innovative gear wheel

Gears have been around for hundreds of years but have essentially looked and functioned exactly the same. And to manage higher forces you basically just increase size of gear so that the total contact surface increased.

But there's a drawback to this solution, increase size of gear wheel increases weight and thereby the inertia. Adding more gear wheels on the same rack leads to an overdetermined system resulting in unequal load sharing. To assemble such a system would be a challenge in itself!

Superior acceleration

Smaller gears with less built-in inertia allow for rapid acceleration and deacceleration.